Audience

Developers, AI agent builders, voice AI teams, contact center platforms, customer support teams, product teams, enterprise automation teams, and conversational AI companies that need realtime speech-to-speech interactions, audio input and output, function calling, tool use, configurable reasoning, image input, long-context voice workflows, transcription, translation, and interactive AI assistants

About GPT-Realtime-2.1

GPT-Realtime-2.1 is OpenAI’s reasoning model with tool use for low-latency voice agents and complex speech-to-speech workflows. It updates GPT-Realtime-2 with improved alphanumeric recognition, silence and noise handling, and interruption behavior, helping applications understand spoken code, manage imperfect audio, and respond more naturally when users pause or talk over the agent. Developers can configure reasoning effort to balance deeper thinking against latency and output usage, while strong instruction following helps the model stay aligned with a defined role, tone, and workflow. It accepts and produces both audio and text, can take images as input, and supports function calling so an agent can retrieve information or perform actions during a conversation. The model has a 128,000-token context window, supports up to 32,000 output tokens, and includes reasoning-token support for extended interactions.

Pricing

Starting Price:
$0.40 per cached input
Free Trial:
Free Trial available.

Integrations

API:
Yes, GPT-Realtime-2.1 offers API access

Ratings/Reviews

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Company Information

OpenAI
Founded: 2015
United States
developers.openai.com/api/docs/models/gpt-realtime-2.1

Videos and Screen Captures

GPT-Realtime-2.1 Screenshot 1
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Product Details

Platforms Supported
Cloud
Training
Documentation
Support
Online

GPT-Realtime-2.1 Frequently Asked Questions

Q: What kinds of users and organization types does GPT-Realtime-2.1 work with?
GPT-Realtime-2.1 works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does GPT-Realtime-2.1 support in their product?
GPT-Realtime-2.1 supports these languages: English.
Q: What kind of support options does GPT-Realtime-2.1 offer?
GPT-Realtime-2.1 offers support via online.
Q: What other applications or services does GPT-Realtime-2.1 integrate with?
GPT-Realtime-2.1 integrates with: gpt-realtime and OpenAI.
Q: Does GPT-Realtime-2.1 have an API?
Yes, GPT-Realtime-2.1 has an API.
Q: What type of training does GPT-Realtime-2.1 provide?
GPT-Realtime-2.1 provides training in the form of documentation.
Q: Does GPT-Realtime-2.1 offer a free trial?
Yes, GPT-Realtime-2.1 offers a free trial.
Q: How much does GPT-Realtime-2.1 cost?
Pricing for GPT-Realtime-2.1 starts at $0.40 per cached input.

GPT-Realtime-2.1 Product Features